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Lung Cancer

Lung cancer is a term used to describe a growth of abnormal cells inside the lung – these cells continue to grow in an unlimited fashion until removed or treated. The abnormal cells stick together and produce a growth or fluid. Doctors call this abnormal cluster of cells a “tumour”. Cancer that starts and grows in the lung is known as a primary “lung cancer”. Sometimes, cancer can spread to the lungs having started as a “primary” in another part of the body such as the breast, bowel, or prostate – these cancers are called lung “secondaries” or “metastases”.

What Causes Lung Cancer?

Lung cancer results from damage to genes in lung cells. This damage allows these cells to grow and divide uncontrollably and eventually, spread throughout the body. Tobacco smoke is the biggest cause of lung cancer; with additional cancer causing agents including asbestos, radiation and others. For some people the cause of their cancer cannot be identified.